Incorrect Authorization Affecting neutron package, versions <2:26.0.3-0+deb13u3


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (21st percentile)

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  • Snyk IDSNYK-DEBIAN13-NEUTRON-18489476
  • published1 Aug 2026
  • disclosed5 Aug 2026

Introduced: 1 Aug 2026

CVE-2026-55707  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Debian:13 neutron to version 2:26.0.3-0+deb13u3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream neutron package and not the neutron package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

In OpenStack Neutron before 28.0.2, the subnetpool onboarding API does not verify ownership of the target subnets. An authenticated user can onboard subnets from another project's shared network into their own subnetpool, mutating the victim's subnet state and altering L3 routing and address scope behavior for victim routers.

CVSS Base Scores

version 3.1